Wanna learn some polish? Enjoy these links:

I recommend to start with Travlang or goto Kris page
You can find some computerterms here and here
Something for vehicle engineers (ie for models)
If you're a climber you can find this place useful
Assorted proverbs... or whatever it is...
Legal, economics and business terms
Another business dictionary

I also found some computer glossarys:
English-polish dictionary
Another English-polish dictionary
Yet another English-polish dictionary
(at least I know what 'brak danych' means now :)

Here's an automatic translator - though don't trust it too much.
Try to translate your phrase back to the original language and you'll see what I mean...

Good luck! /Sia